i've been thinking about putting a medium duty front clip on for a long time because i wanted easy access to the engine. But i probably won't do it because i've got my engine tuned pretty dependable now and if i need close access/attention to it i can just take it out in probably under 4 hours.
Anyways, i stumbled upon this video yesterday while looking for something completely unrelated:
So this proves it can be done.
However, i still feel, for what you are wanting to do, that simply getting a nice 6500/7500 would be less hassle. Register in another state if Or regulations are too stringent?